The invention relates to a feed system, rack bar and drive sprocket for moving an underground winning machine, comprising a travel drive with drive sprocket having symmetrically profiled teeth, and rack bars 1 with a plurality of rack teeth 2; 20, being arranged between a supporting strip 7 and a guide strip 5 of the rack bar. The tooth flanks 14; 24 of the teeth 2, 20 are inclined in the direction of movement and diverge towards the tooth tip 13; 23 for the interaction with tooth surfaces 34 of teeth 31 of drive sprocket 30. In order to provide a feed system, including rack bars and drive sprockets therefor, in which interaction between the teeth is improved and produces less wear, the two tooth flanks 14, 24 of each rack tooth 2, 20 are concavely arched and form a trough between guide strip 5 and supporting strip 7 transversely to the direction of movement, with the trough rising towards the tooth tip 13; 23, and the two tooth surfaces 34 of each drive sprocket tooth 31 is convexly arched and forms a crown transversely to the direction of movement.
E21C 29/02 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par des moyens sur la machine exerçant une poussée en s'appuyant sur des supports fixés
2.
ADVANCING ASSEMBLY AND POWERED SHIELD SUPPORT HEREWITH
The invention relates to an advancing assembly for underground powered shield support, comprising at least one floor skid (7) for supporting the powered shield support, an advancing beam (9) and a substantially perpendicularly arranged lift cylinder for lifting the floor skid (7) relative to the advancing beam (9) during an advancing movement. The lift cylinder has a cylinder foot supported above the advancing beam (9) and a cylinder head buttressed on a bridge (16) and hydraulically displaceable relative to the cylinder foot. In order to improve a powered shield support and in particular the advancing assembly of a powered shield support, the lift cylinder consists of a double lift cylinder (10) having a first cylinder stage (11), comprising the cylinder head, and a second cylinder stage (12), wherein a compression spring is arranged between the cylinder stages (11; 12).
E21D 23/04 - Caractéristiques structurelles de la construction de soutènements, p. ex. organes de liaison entre châssis adjacents ou séries d'étançonsMoyens pour empêcher un glissement latéral sur un sol incliné
The invention relates to a sensor device and a method for the geoelectrical prospecting of the location, the (stratographic) arrangement, and the course of raw mineral deposits and of the adjoining rock delimiting these deposits, particularly in the continuous working of the mineral deposits, having a sensor head (51) whose front surface forms the sensor measuring surface (53), and at least one electrode. According to the invention, the sensor head (51) can make contact with a ground surface, and a central electrode (54) and a plurality of outer electrodes (55) distributed geometrically uniformly around the central electrode (54) are arranged on the sensor measuring surface (53), the central electrode (54) and the outer electrodes (55) being electrically conductive and electrically separated from one another.
G01V 3/15 - Prospection ou détection électrique ou magnétiqueMesure des caractéristiques du champ magnétique de la terre, p. ex. de la déclinaison ou de la déviation spécialement adaptée à l'utilisation pendant le transport, p. ex. par une personne, un véhicule ou un bateau
4.
TAIL STATION FOR A SCRAPER CHAIN CONVEYOR AND CHAIN WHEEL ASSEMBLY THEREFOR
The invention relates to a tail station for a scraper chain conveyor, particularly a transfer conveyor, comprising a machine frame (5) having bearing holders that are open at the edges for a chain wheel assembly (10) that can be removed, a chain wheel assembly (10) having a chain wheel shaft, a reversing chain wheel (11) and bearing shells (16) for pivotably mounting the chain wheel shaft, and at least one deflector element associated with the reversing chain wheel (11). In order to optimize a tail station, particularly for high-performance conveyors, and facilitate the replacement of a chain wheel shaft assembly, the bearing holders (14) are designed on cantilever arms (12) connected to the machine frame (5) and open at the top, wherein the chain wheel assembly (10) is provided with bearing blocks (15) at the bearing shells (16), which can be inserted into the bearing holders (14) with horizontal movement clearance and horizontally displaced in the bearing holders (14) between a removal position and a locking position.
The invention relates to rack and pinion arrangement for advancing e.g. a shearer loader comprising a toothed driving sprocket, with rack and pinion rods (1) having a plurality of lantern teeth (2), a respective end tooth (20) being arranged at both ends (6, 6A) of each rod (1), the end tooth profile of the end tooth differing from the tooth profile of the inner teeth (2) arranged between the end teeth (20). The invention relates also to the rack and pinion rods. In order to improve interaction between the teeth of the sprocket and the rods, the end teeth (20) are formed symmetrically to a vertical end tooth centre plane (M') and the tooth head (23) of the end teeth (20) is positioned lower than the tooth heads (13) of the inner rack and pinion teeth (2).
E21C 29/02 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par des moyens sur la machine exerçant une poussée en s'appuyant sur des supports fixés
6.
GOB SHIELD FOR SHIELD SUPPORT AND METHOD FOR THE PRODUCTION THEREOF
The invention relates to a gob shield for a shield support and to a method for producing such a gob shield. The gob shield comprises a metal cover plate (14), two cap connecting joints (21) for connecting the gob shield to a hanging roof cap, and two lateral metal plate pairs (15), each having two lateral metal plates (13, 16) with pin receptacles (11, 12) for fastening guide levers of a guide lever gear to the gob shield. In order to simplify the production of the gob shield, each cap connecting joint (21) is part of an elongated assembly (20), which can be produced separately and welded, with a rear end, in the intermediate space between the lateral metal plates (13, 16) of a lateral metal plate pair (15), before the master assembly (40) made of the assembly (20) and lateral metal plate pair (15) is welded to the metal cover plate.
E21D 23/04 - Caractéristiques structurelles de la construction de soutènements, p. ex. organes de liaison entre châssis adjacents ou séries d'étançonsMoyens pour empêcher un glissement latéral sur un sol incliné
7.
METHOD FOR DETERMINING THE POSITION OF INSTALLATION COMPONENTS IN MINING INSTALLATIONS
The invention relates to a method for determining the position and/or situation of installation components of a mineral mining installation which has as installation components at least one face conveyor 2 for removing mined material, one shield- type support 13 for keeping a face 1 open, pushing devices 14 for pushing the face conveyor 2 and the shield- type support 13 in active operation, an extracting machine 9 which can be moved along the face conveyor 2, and a drift conveyor 16, the position and situation of at least one installation component being de¬ termined by means of a measuring system 20 comprising a detection unit with measurement sensor. According to the invention, the detection unit 22, decoupled from the movement of the extracting machine 9, can be or is moved to and fro between two points of the guiding system 21 along at least one installation component at the face such as, e.g. the face conveyor 2, by means of a separate guiding system 21. The invention also relates to the mining installation 10 itself.
The invention relates to a trough pan (1) comprising an upper-strand well (50) and to an upper-strand well (50) for a trough pan of a scraper chain conveyor, having two side profiles (12) and a well bottom (11). The well bottom (11) has two side edges and two end edges 15, 15', which at least partially have a corrugated boundary line and which are provided with a chamfer having a chamfer angle at the transition of a top side 11' into the end edge 15, 15'. In order to improve the upper-strand wells and the trough pans equipped therewith regarding the problem of the penetration of coal fines into the intermediate gap of the support area between the well bottom and the intermediate bottom, the end edges 15, 15' are provided with a tapering between the chamfer and a bottom side, wherein the tapering extends more steeply than the chamfer.
B65G 19/18 - Transporteurs comportant un impulseur ou une série d'impulseurs portés par un élément de traction sans fin et disposés de façon à déplacer objets ou matériaux sur une surface porteuse ou sur un matériau de base, p. ex. transporteurs sans fin à raclettes Détails
E21F 13/06 - Transport spécialement adapté aux conditions du fond au front de taille ou à proximité du front de taille
9.
HYDRAULIC SWITCHING MECHANISM FOR MOBILE HYDRAULICS, MOBILE HYDRAULIC MACHINE AND VALVE UNIT
The invention relates to a hydraulic switching mechanism (10) for the mobile hydraulics of, for example, hydraulic excavators, with a valve block, with electrohydraulically activatable valve units for controlling the movement of a working cylinder (6) whose cylinder chambers (ZA, ZB) can be selectively connected to a pump connection (P) for hydraulic fluid, to a tank connection (T) or to one another, and with pre-control valves for activating the valve units, wherein the hydraulic switching mechanism, by means of separate tank valve units (C2, C4) and pump valve units (C1, C3 ) according to the invention, and also a suitable pre-control system (7), makes it possible to achieve not only a directional control valve function but also to achieve a directly controlled and superimposed pre-controlled lowering braking function, a maximum pressure safeguarding of the cylinders and a proportional throttle valve function for the controlled displacement under negative load forces in the direction of movement and braking in an emergency. Furthermore, the invention also relates to mobile hydraulic machines having such a hydraulic switching mechanism and also to valve units therefor.
F15B 13/04 - Dispositifs de distribution ou d'alimentation du fluide caractérisés par leur adaptation à la commande de servomoteurs pour utilisation avec un servomoteur unique
F15B 13/042 - Dispositifs de distribution ou d'alimentation du fluide caractérisés par leur adaptation à la commande de servomoteurs pour utilisation avec un servomoteur unique actionnés par la pression du fluide
F15B 13/043 - Dispositifs de distribution ou d'alimentation du fluide caractérisés par leur adaptation à la commande de servomoteurs pour utilisation avec un servomoteur unique actionnés par la pression du fluide avec clapets-pilotes commandés électriquement
F15B 13/02 - Dispositifs de distribution ou d'alimentation du fluide caractérisés par leur adaptation à la commande de servomoteurs
The invention relates to a pressure relief valves, especially a rock-burst safety valve for the hydraulic face support, having a consumer connection (3) with a bore (2) a fluid outlet (4), and a valve piston which is arranged in the valve and pressed against a valve seat (7) by means of a valve spring system (6) for separating consumer connection and fluid outlet. In order to improve the valve with regard to construction and functioning such that a rapid and reliable response behaviour for the opening and closing movements can be achieved, the valve seat (7), the bore (2) of the consumer connection (3) and the fluid outlet (4) are formed on a head piece (1) having a guide bore (24) for the valve piston (5). Furthermore, the valve spring system (6) has at least one disc spring stack (12) having disc springs (11) which are arranged in the valve housing (13), wherein the actuating force of the spring stacks is applied against an end of the valve piston (5) that is remote from the sealing seat (7).
E21D 15/44 - Étançons hydrauliques, pneumatiques ou hydropneumatiques
E21D 15/46 - Étançons télescopiques avec dispositifs mesurant la chargeÉtançons télescopiques avec dispositifs d'alarme
E21D 15/51 - Parties constitutives ou détails des étançons spécialement adaptés aux étançons hydrauliques, pneumatiques ou hydropneumatiques, p. ex. aménagements de soupapes de sûreté
E21D 23/16 - Caractéristiques hydrauliques ou pneumatiques, p. ex. circuits, disposition ou adaptation de soupapes, dispositifs de mise en place ou de retrait
F16K 17/04 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté actionnés par ressort
11.
MINING PLOUGH FOR PLOUGH SYSTEMS AND PLOUGH SYSTEM FOR INCLINED FORMATION
The invention relates to a mining plough (10) for plough systems for the exploiting of minerals in inclined formations. In order to provide a mining plough and a plough system, with which coal seams, in particular seams in steep formation can be exploited economically and with high operating safety, the mining plough 10 comprises a separable plough body having two plough body basic elements (20A, 20B), each being provided with a fixture (21) for a separate traction means and with a guide means (23, 22), for moving the coal plough by means of at least two traction means (11A, 11B) and for guiding the coal plough on at least two mutually spaced guide mechanisms (7A, 7B).
E21C 27/34 - Machine propulsée le long du front de taille par câble ou chaîne
E21C 29/14 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par câbles ou chaînes par câble ou chaîne de halage tirant la machine le long du front de taille
E21C 35/12 - Guidage de la machine le long d'un convoyeur pour la matière minérale taillée
12.
BIT ARRANGEMENT FOR A MINING PLOUGH, AND MINING PLOUGH FOR PLOUGH SYSTEMS
The invention relates to a bit arrangement for fastening to a plough -body element (55) of a mining plough (50) for underground mining, particularly of a coal plough for the excavation of steeply disposed coal seams, having a plurality of bit pockets (130) for accommodating, preferably demountably, respectively one bit (131) per bit pocket. In order thereby to create a bit arrangement and a mining plough that can be used advantageously for the excavation of steeply disposed mineral deposits and that render possible economic excavation of such mineral deposits, at least two bit pockets (130) are locked in recesses (160) on a front side of a bit strip (111), which is provided, on a back side, with at least one groove indentation (114) for the positive engagement of a locking projection on the plough -body element and is detachably fastenable to the plough -body element by means of detachable fastening means (70).
The invention relates to a rack arrangement 1 for underground winning installations, comprising bearing brackets 10 being fas tenable at pan sections 4 of a face conveyor and which have two pin holes 9 each, and comprising rack bars 30A, 30B being detachably fastenable to the pin holes 9 of adjacent bearing brackets 10 via pin connections having connecting pins 7. In order to design the rack arrangement and the bearing bracket for easier fitting and to improve the interplay between bearing bracket and rack bars in operational use, both pin holes are designed as an elongated hole 9 for accommodating the connecting pin 7.
E21C 29/02 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par des moyens sur la machine exerçant une poussée en s'appuyant sur des supports fixés
The invention relates to a chain wheel arrangement for chain drives of mining machines, with a chain wheel shaft 1, with a chain wheel, with bearing shells 4 receiving bearings 5 for the chain wheel shaft, with a chain wheel-side sliding ring seal 42 and with a bearing-side sliding ring seal 41. In order to improve the service life of the chain wheel arrangement, at least one of the bearings 5, preferably that of the movable bearing system 3, is arranged in a bearing bush 50 which is arranged between the bearing shell 4 and outer bearing ring 5B and received in the bearing shell 4 in an axially displaceable manner. The additional bearing bush 50 allows the necessary gap between the rotating parts and the non-co-rotating, bearing shell-side parts to remain substantially constant and to this extent to become independent of the bearing play of the respective bearings.
The invention relates to a scraper (10) for scraper chain conveyors, with a top web (12) on which a chain-connecting region (13) for joining the scraper (10) to a scraper chain is formed, and with scraper wings for guiding the scraper on side profiles and on the base of a scraper chain conveyor. In order to provide scrapers which can be used to achieve a greater conveying capacity or a reduction in the driving power to be installed and which also permit a worn or defective scraper to be changed underground, according to the invention the scraper wings consist of a holding section (14) anchored to the metallic top web (12) and a sliding insert (40) which is formed from plastic and can be fastened releasably to the holding section (14). Various embodiments are proposed for the sliding inserts (40) and the locking in place thereof.
The invention relates to a plough for underground extraction, in particular a coal plough, comprising a plough body (3), to which guide elements for guiding the plough (4) on guide rails (7, 9) of a machine guide for the plough are detachably fastened, wherein each guide element (20, 40) comprises a guide mount (21, 41) having a substantially U-shaped cross-section in order to encompass the guide rail, wherein the guide mount is bounded laterally by two side legs (22; 42) that are arranged at a distance to each other and that extend in the direction of motion of the plough (4) from a front end to a rear end of the guide element. In order to achieve an improved running behavior on the machine guide and a higher service life, the inner walls of both side legs (22; 42) extend at least partially curved between the front and the rear ends, and the open distance between the side legs (22; 42) is larger in the area of the front and rear ends, respectively, than in a center area of the guide mount (21; 41).
The invention relates to a link chain for chain conveyors for use in mining, with vertical chain links having a constant cross-sectional profile provided on the inside with a circular arc and on the outside preferably with a flat section, and with horizontal chain links (310) having front sections (311), longitudinal limbs (312) and an oval inner opening (313). In order to provide a high- strength link chain, the longitudinal limbs (312) on the outer sides (341) comprise at least adjacent to the upper and lower sides a spherical shaped surface and/or the horizontal chain links (310) comprise on the transition of the front sections (311) into the longitudinal limbs (312) corner areas (345), wherein the longitudinal limbs (312) on their top side und bottom side at least in the corner areas (345) are partially provided with a cavity (360).
The invention relates to a pan section for combined conveying and winning apparatuses, comprising a bottom run (3) and a top run (4) for guiding driver elements of a conveyor chain, as well as a welded frame structure (1) which has two side cheeks which consist of one-piece rolled profiles (2). The profiled (2) are having a constant profile shape with a bottom leg (11) and a top leg (12), which are angled outwards in the assembled state, and an intermediate leg (13)being provided with an offset (14) for supporting and welding at least one intermediate plate (7). In order to improve the pan for use in shearer loader operations a substructure (20) is provided, being connected to the bottom leg (11) of the rolled profiles (2) to connect both bottom legs (11) to one another at a distance from the intermediate bottom (7). The substructure has mounting pieces (30) positioned at the ends below the bottom legs (11) for transverse-force transmission means.
The invention relates to a conveyor pan for a mining conveyor. The pan comprises a substructure (1) with two side elements (2, 3) and an intermediate floor (5) as well as a changeable trough (20) forming a top strand and being detachably and exchangeably fastenable to the substructure (1). The trough (20) comprises side profiles (21), each with a top web (23), and the top strand fastening means comprising screw bolts being fixable in place on the substructure (l).In order to ease an exchange of the trough (20), at least the top web (23) of one side profile (21) is provided with a plurality of open-edged indentations (28), in which there are welded holding strips (27), which project laterally over the top web (23) and are provided with a plurality of bolt holes (26) for the passage of a plurality of screw bolts.
The invention relates to a drive and tensioning unit for a scraper chain conveyor, in particular a face conveyor for drum cutter-loader mining apparatus, comprising a telescopically configured machine frame (10) having a machine frame base and a machine frame head, which is displaceable relative to the machine frame base by means of at least one hydraulic cylinder (20) and has bearing recesses (6) for supporting a chain drum shaft, each hydraulic cylinder (20) being supported at one end in a connecting joint (30) on a side board (4) of the machine frame head (2) and at the other end in a connecting joint (30') on a side wall (15) of the machine frame base (1) in order to improve the unit, the connecting joint (30) comprises a recess in the side board (4) and/or in the side wall (15) and a bearing bracket detachably anchorable in the recess (31), wherein structurally identical recesses are provided in both side boards (4) and in both side walls (15).
B65G 23/44 - Dispositifs de tension des courroies ou des chaînes
B65G 19/18 - Transporteurs comportant un impulseur ou une série d'impulseurs portés par un élément de traction sans fin et disposés de façon à déplacer objets ou matériaux sur une surface porteuse ou sur un matériau de base, p. ex. transporteurs sans fin à raclettes Détails
21.
Link chain for chain conveyors and horizontal chain links therefor
The invention relates to a link chain for scraper chain conveyors with vertical and horizontal chain links 1, 10 which are interlinked in an articulated manner for scraper chain conveyors for use in mining. The invention relates in particular to horizontal chain links with front sections 11 with a straight face zone 18 and with longitudinal limbs 12, which connect the front sections around an oval inner opening 13 and which are provided on their outer surfaces with a recess 14, wherein the rear sides of front sections 11 delimiting the inner opening form a contact zone for circular arcs of vertical chain links. In order to improve the service life of the link chain, the rear sides, which face oval inner opening 13, of front sections 11 are provided with a surface which has a hollow 21, which forms a central region of the contact zone, between a fillet cambered in a crowned manner.
The invention relates to a shield support assembly for underground mining, comprising a shield canopy and at least one floor runner 20 as supporting surface elements which are connected in an articulated manner and which can be pressed against rock by means of at least one hydraulic cylinder which is supported in bearing pans 8 on the shield canopy and floor runner 20, wherein each surface supporting element consists of a welded construction of welded-together components. In order to be able to support higher forces without increasing the overall weight, according to the invention at least one of the supporting surface elements comprises at least one hollow metal box profile 22 filled with a solid as a component of the welded construction 30. The invention also relates to the configuration of the floor runner and/or the shield canopy with at least one hollow metal box profile filled with solid, preferably concrete.
E21D 23/04 - Caractéristiques structurelles de la construction de soutènements, p. ex. organes de liaison entre châssis adjacents ou séries d'étançonsMoyens pour empêcher un glissement latéral sur un sol incliné
The invention relates to a shield cap for a shield-type support for underground mining, with a cap plate 2, with reception devices 4 for the connection of hydraulic cylinder heads to the shield cap and with a supporting structure 3 welded below the cap plate 2 and having a plurality of longitudinal spars. In order to simplify the outlay in manufacturing terms and to increase the bending strength, at least two of the longitudinal spars consist of I-profile struts 10 with an upper profile chord 12, a lower profile chord 11 and a middle chord 13 running perpendicularly to the two profile chords, the distance between the upper and the lower profile chord decreasing at least over a part length of the I-profile strut 10.
The invention relates to a chain guide for a driving chain of a mining planing machine or the like, provided with a chain guiding element (21) arranged on a driving or guiding station (17), transversally to the direction of movement of the chain, against same. According to the invention, the chain guiding element comprises at least one pressure roller (22) arranged against the chain links of the driving chain, significantly reducing the wear on the chain guiding element.
E21C 29/14 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par câbles ou chaînes par câble ou chaîne de halage tirant la machine le long du front de taille
25.
CONNECTOR DEVICE FOR TROUGH PANS ON MINING EQUIPMENT TROUGH PAN AND ASSEMBLY COMPONENT FOR THE SAME
Connector device for connecting an assembly component, in particular a cutter guide device, to a lateral element of a trough pan on a piece of mining equipment, with first fittings (20) arranged on the lateral element (13), counter fittings (30), arranged on the assembly component (6)detachably connectable to the fittings and at least one security piece (40), which prevents a detaching of fitting (20) and counter fitting (30) when in the closed position and which permits detaching when in the open position. According to the invention, assembly and disassembly may be simplified, wherein the security piece (40) is provided with a hydraulic cylinder (45) for moving the security piece (40) between the open and closed positions.
The invention relates to an adjustment device for a roof cutter holder arranged height-adjustably on the plough body of a winning plough, with a worm wheel (6) for interacting with a rack-like toothing on the roof cutter holder, with an input shaft (8) for actuating the worm wheel, preferably with a gear unit (9) interposed between the input shaft and the worm wheel, and with a head plate (1) which has a passage (18) for the input shaft and which can be fastened or is fastened fixedly in terms of rotation on the plough body (1). To make it possible to mount and release the roof cutter holder adjustment device in a simple manner, the head plate (1) comprises at least one fastening device to which a securing element (21), which can be plugged onto the free end of the input shaft, can be fastened fixedly in terms of rotation in the mounted state.
E21C 27/34 - Machine propulsée le long du front de taille par câble ou chaîne
E21C 31/08 - Moyens d'entraînement incorporés aux machines pratiquant des saignées ou libérant complètement la matière minérale de la veine pour ajuster des parties de la machine
The invention relates to a carriage for an underground recovery plough, comprising a carriage body that can be introduced into a cavity in the plough body and which comprises a front part (11) on the rear side of a guide recess (17). The ends of said front part point in the direction of travel form stop surfaces (12) that interact with counter stop surfaces in the cavity of the plough body. According to the invention, a damping device (20) acting in both directions of travel in a damping manner is integrated into the front part (11) of the traction carriage (10). The aim of the invention is to provide a low-maintenance damping device that allows an economical transmission of force between the stop surface on the traction carriage and the counter stop surface on the plough body. Said aim is achieved by virtue of the fact that the coupling piece (14) is displaced in relation to the stop surfaces (12) counter to the restoring force of a damping system of the damping device (20) that is arranged between the stop surfaces (12).
The invention relates to an extraction system for mineral extraction, having a machine frame (11) movable along a supply device, said machine frame having detaching tools (14, 15) for the material to be extracted for each travel direction on the front side (13) thereof when in operation facing a working face, and having a sensor system for recognizing mineral host rock disposed on the machine frame (11). In order to create an extraction device that may be used or provided with an improved sensor system, a retaining box (20) for the sensor device is attached in a projecting manner on the front side (13) of the machine frame (11), wherein a georadar is preferably disposed in the retaining box (20) as a sensor system.
The invention relates to a roller drill for removing material, especially rocks, minerals, or the like, according to the undercutting principle. Said roller drill comprises a cutting edge (12) that is concentric to a central axis M and conically widens towards the face (11) of the roller drill (10), and a supporting element (15) which is arranged on the internal face of the cutting edge (12) and extends to the face (11) of the tool. In order to design a roller drill or a roller bit, the down time of which is shorter or the useful life of which is longer than in prior art, the cutting edge (12) is made of a harder material than the supporting element (15), and the supporting element (15) forms an annular web (22) which is conical at least on an external circumferential wall (20) and delimits a free space (21) on the face (11) of the drill/bit by means of the internal circumferential wall (23) thereof. The drill/bit can be autonomously resharpened as a result of the free space and the different material combination.
The invention relates to an extraction device, particularly for mining, comprising two drive stations (1, 4) and a drive chain (6) circulating between the sprockets (3, 5) thereof. In order to be able to detect a hanging chain or chain wear on a supply chain in a supply system (10) or a plane chain in a plane system, magnetic sensor units (20) are provided for detecting at least one chain state of the drive chain, wherein each sensor device (20) comprises a transmitter formed by a static or dynamic magnetic field generator and a detector field (22) provided with a plurality of magnetic field detectors (23) as a detector that are disposed to the side of a passage for the strand of the drive chain (6) to be scanned. The invention further relates to a method for controlling an extraction device for preventing hanging chains.
E21C 29/14 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par câbles ou chaînes par câble ou chaîne de halage tirant la machine le long du front de taille
B65G 23/44 - Dispositifs de tension des courroies ou des chaînes
E21F 13/06 - Transport spécialement adapté aux conditions du fond au front de taille ou à proximité du front de taille
31.
DRIVE STATION FOR AN UNDERGROUND PLOUGH SYSTEM AND METHOD FOR REPAIRING RECOVERY PLOUGHS
The invention relates to a drive station for an underground plough system (10), in particular a coal plough system, comprising a machine frame (2), on which a plough stock (30) can be fixed, and a wedge groove (3) that is connected to the machine frame (2) and that is provided with a chain channel for a plough guide unit (5') that has a plough chain and comprising an end stop on the runout section of the recovery plough. To facilitate the repair of a recovery plough, the end stop (51) is formed on an attachment (50) which can be dismantled from the assembled plough guide unit (5'), creating a repair section in the longwall-gallery transition of the wedge groove (3). The invention also relates to a repair method, in which the end stop (51) is dismantled and the recovery plough is driven into the repair section.
E21C 29/14 - Propulsion des machines pratiquant des saignées ou libérant complètement la matière minérale de la veine par câbles ou chaînes par câble ou chaîne de halage tirant la machine le long du front de taille
32.
DEVICE FOR DETERMINING THE CUTTING HORIZON OF A MINING EXTRACTION SYSTEM, AND PAN ELEMENT THEREFOR
The invention relates to a device for determining the cutting horizon of a mining winning system, having a movable conveyor which is composed of individual pan elements, and having at least one optical detection sensor (20) which has a sensor head (24) that is received in a sensor carrier (27) and can be pressed with at least one pressure means (26) against a coal/basement rock boundary layer. In order to improve the sensing and working reliability, over the length of the conveyor, a plurality of pan elements are configured as sensor pans (50) which are provided with a protected recess (21) which is open to the basement rock and in which the sensor carrier (27) is arranged or can be arranged such that it can be disassembled together with the sensor head (24).
brevets